/**
   Join file1 and file2 based on timestamp in first column - not strictly an "equality join", 
   but join file2 record that has closest timestamp to file1 record timestamp.
   Assumes that timestamps in both files are in ascending order.
 */
public class JoinTimes {

    public static void main(String[] args) {
	if (args.length != 2) {
	    System.err.println("usage: file1 file2");
	    return;
	}

	String file1name = args[0];
	String file2name = args[1];
    }
    
}